Thank you very much!
In my setup, the content displayed in the Widget differs depending on the NPC. So, I used a Blueprint Interface (BPI) to send that Widget information from the Widget to the character.
At that point, the character’s BPI already had a reference to the NPC’s actor, so I promoted that reference to a variable in the character blueprint.
Then, I sent that actor reference variable from the character back to the Widget, and used that reference within the Widget to send notifications to the correct NPC.
Looking back, I wonder if that process was inefficient.